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Install on a Kubernetes cluster
This guide walks you through the installation of the latest version of Knative using pre-built images.
Before you begin
Knative requires a Kubernetes cluster v1.15 or newer, as well as a compatible
kubectl. This guide assumes that you've already created a Kubernetes cluster
which you're comfortable installing alpha software on.
This guide assumes you are using bash in a Mac or Linux environment; some commands will need to be adjusted for use in a Windows environment.
Knative depends on Istio. If your cloud platform offers a managed Istio
installation, we recommend installing Istio that way, unless you need the
ability to customize your installation. For example, the
GKE Install Guide includes the instructions for
installing Istio on your cluster using
If you prefer to install Istio manually, if your cloud provider doesn't offer a managed Istio installation, or if you're installing Knative locally using Minkube or similar, see the Installing Istio for Knative guide.
You must install Istio on your Kubernetes cluster before continuing with these instructions to install Knative.
cluster-local-gateway for serving cluster-internal traffic
If you installed Istio, you can install a
cluster-local-gateway within your Knative cluster so that you can serve cluster-internal traffic. If you want to configure your revisions to use routes that are visible only within your cluster, install and use the
The following commands install all available Knative components. To customize your Knative installation, see Performing a Custom Knative Installation.
To install Knative, first install the CRDs by running the
kubectl applycommand once with the
-l knative.dev/crd-install=trueflag. This prevents race conditions during the install, which cause intermittent errors:
kubectl apply --selector knative.dev/crd-install=true \ --filename https://github.com/knative/serving/releases/download/v0.12.0/serving.yaml \ --filename https://github.com/knative/eventing/releases/download/v0.12.0/eventing.yaml \ --filename https://github.com/knative/serving/releases/download/v0.12.0/monitoring.yaml
To complete the install of Knative and its dependencies, run the
kubectl applycommand again, this time without the
--selectorflag, to complete the install of Knative and its dependencies:
kubectl apply --filename https://github.com/knative/serving/releases/download/v0.12.0/serving.yaml \ --filename https://github.com/knative/eventing/releases/download/v0.12.0/eventing.yaml \ --filename https://github.com/knative/serving/releases/download/v0.12.0/monitoring.yaml
Monitor the Knative components until all of the components show a
kubectl get pods --namespace knative-serving kubectl get pods --namespace knative-eventing kubectl get pods --namespace knative-monitoring
Now that your cluster has Knative installed, you can see what Knative has to offer.
To deploy your first app with the Getting Started with Knative App Deployment guide.
Get started with Knative Eventing by walking through one of the Eventing Samples.
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